Paper-drying machine.



N"3 29f686 PATENTED Ana-28,1906. A Y w. M. BARBER.

PAPER DRYING MACHINE.

APPLICATION FILED PBJS. 1904. I

' 4 SHEETS-SHEET 1.

No. 629,666. PATENTED AUG. 26, 1906.

W. M. BARBER.

' PAPER DRYING MACHINE. APPLICATION FILED APR. 23. 1904.

4 SHEETS-SHEET 3.

W. M. BARBER.

PAPER DEYING MACHINE. APPLIOATION FILED APR. 23.1904.

PATENTED AUG. 28, 1906.

4 SHEET-#SHEET 4.

f UNITED 4STATES WILLIAM M. BARBER, oF SoMERvILLE, MASSACHUSETTS, ASSIeNoRoE RATENT OFFICE.-

ONE-HALF To EDGAR W. ANTHONY, 0F BROOKLINE, MASSACHUSETTS.

PAPER-DRY'ING MACHINE. i l

1'0 all whom, iv' mln/'y concern:

Beit known that I, WILLIAM M. BARBER, a citizen of the lUnited States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Paper-Drying Machines, of Which the .following is a full,

- is passing. The action of live steam, how- P61501 of dryinglit with such intensity as to' 'destroy Its life, especially When the paper is z 5 `clear, and exact description, reference being over the exterior surface of which the paper ever, among other disadvantages, .has been 'to heat the rolls to a high degree of temperature, With the effect of baking the web of pahugged up tight against the rolls bythe felt,f so called, Which is customarily used ini this type of machine. Moreover, when the drier-rolls alone'.are used those portions of the paper running betweenA the rolls are s'ubj ected to no drying influence, with the effect that the paper in the continuous web is not continuously but intermittently acted upon.` ier-rolls are heated- By my invention the by a current or blast of ot air directed upon ory subjected to their outside surface and Which hot air is further directed to ow directly against the sides of those portions of the web of paper passing between the rolls or to and from the same. By this means the paper becomes dried in a manner which does notinjure or weaken its textile strength.

This results, perhapsv more essentially, from.

the fact that the Ypaper is not subjected to the drying influence of a drier-roll too intensely heated, as when heated by steam, for theshot air applied'to heat the roll may be so modified in temperature as to heat the roll to just such degree -as will best dry the paper Without in any Way injuring or weakening its fiber. By the above means also the Web of paper is subjected to a continuous drying iniiuence throughout the entire length of' its anemona' ing the additional function of ironing the paper and keeping it smooth. I

My invention pertains also vto'a cordination of means by Whicha proper tension of the paper as it is dried maybe effected and Patented Aug.. `28,1906.

running with lthe heated drier-rolls performmaintained. In'forder that-the paper mayl I dry smooth, the Web of pa er must be maintained inthe runningun er tension. This tension varies or should-vary for different parts of the machine, depending upon the condition of the pa er, for When the Web of paper iirst enters t e machine it can stand ut very little tension; but as it becomes dry it can bear and should be.subjected .to some -considerable tension in order to. obtain the best results At no point,*however, should the tension on the pa er be such as to stretch it, and so injure its 'ii er. Now if there Were no further consideration a proper tension of `the paper might be easily effected; but it is Well known in thefart that the paper gradually contracts or shrinks as `it dries, and unless the contraction or shrinkage ofthe pa- 'per While running is compensated or provided for thetension of the paper will soon become such that it becomes lstretched and its fiber materially weakened. '-Moreover, this contraction or shrinkage of the paper is not a constant factor, but a variablel one, the

rapidity of contraction or shrinkage varying in differentarts of the machine, at some points the s inkage or contraction of the paper taking place very fast, depending upon the state or condition of its drying, which de-j4 ends, among other considerationshuponthe kind of paper and the amount or natureof the drying influence to which it is "Subj ected.

By my invention there is embodied in the improved machine means by which the web of paper in all parts of the machine may be maintained at an accuratey normal tension, by which also any undue tension on the paper may be met and automatlcally com pensated for, by which means also any tend- 'ency to undue or abnormal tension in the Web of paper may be immediately shown to the operator or recorded, whereupon', as is Ioo further provided, vhe ymay vary the Speed of l any one-'of a series of rolls, and thereby thus make compensation for a variable contractionv or shrinkage of thel paperl at vvdifferent lss points of the machine and maintain it at a proper variable tension as desired to effect the best results. A

My invention further pertains to various i 5 details of'construction, all ofwhich can best be seen and understood by reference to the drawings, in which- Figure 1 shows the improved machine in side elevation. Fig. 2 shows a section on the line 2 2 of Fi 1. Fig. 3 shows a section on the line 3 3 o Fi 1'. Fig. 4 shows in 'cross'..

section a roll an combined hood. Fig. 5 is a vertical section showing the tension roll or device, to which reference will hereinafter be made. Fig'. '6 is a plan of the same.

Referring to the drawings, A represents r the frame of the machine. It is made sectional in character, comprising a series of like units or sectional arts a., and so is capable of indefinite longitu 'nal extension. Each sec- 'tion ahas two sides, each of which, a', has a base a2, resting upon the iioor or other support, to which 1t is bolted. Each section has also a top-surface bearing-plate a3. The two sides of each section are connected together by cross-ties a4. The sections are connected together or combined by bolting together the iianges a5 a dependent from'the respective ends of their top plates a3. Supported to have -bearin within each section side of the frame is a pil ow-block or other means a7, providing journals for the ends of the shaft of a drier following manner:

Each rollis provided with a hood D,

placedto conjoin or combine with the naked or exposed portion of its surface or periphery.

around'any roll it practically forms a fold, and as the roll turns its entire surface or periphery is not covered by the pa er, but a portion thereof remains naked an exposed, and it is with this portion of the surface or periiphery of the roll within the fold of the web o paper made by its passing around the roll v,

i furnish each roll of the machine with a hood,

that the hood is placed to ooperate.

The hood D is in the nature of a casing.

forming anair-chamber extendinglongitudinally along over the said surface of the roll or portion of its periphery. In size the hoods may vary, depending somewhat on the relative size of the roll with which they are coheated and the paper dried byhot air .in the It is to be observed that as the paper passesA and `between he sides of the ame in any suitable' manner, as by angle-irons d, each of the respective hoods being fixed to coperate with itsroll inthe manner shown and as before described'.-

l Each hood has an opening d and ipe connection d2 for the inlet of hot air. T 's o ening is preferably made at the rear end o the" air in the cham er acts to heat the entire roll,

for as the roll rotates every portion of its surface inturn is exposed to the hotair influence. With a hood or casing thus in conjunction witha roll not only is theA hot airin the chamberof the hood utilized and applied for the purpose of heating the roll, and so indirectly'drying the paper contacting with it,

operating. The-hoods or casin ls are fixed to but the hot airis further utilized for the purpose of dryin the aper web directly by application to t e si es of the fold of thev web of paper with which and betweenwhich the hood is located. For this purpose each hood or casing relatively to the roll with which it is in conjunction is so mounted that its edges are not brought into close contact flush u against the surface or periphery vof the roll but are slightly removed from the same, leaving a narrowwair-space d3 on either side, extending the length of the roll and through which passages the hot air in the chamber of the hood escapes land 4coursing alongthe surface of the roll outside'the confines of the hood on either side comes in contact directly with the respective sides ofthe 'fold in thel web of paper made by `passing around the roll, by which contact the current of hot air is brokenv or disseminatedand made to'low over thev surfaces of saidsides of the Web of paper. To'assist further in this operation,- I prefer also to make narrow slits or openings roo d4 in the sides of the hood for the vhot air to. 'u

pass through; but'these openings should of course not provide such egress for the escape of hot air as to prevent its properly h eatlng the roll.

While I have referred-to the fact that each one of the rolls of the machine is provided with a hood furnishing a hot-air chamber, of course any one or more rolls may be provided with such hood. I prefer, however, to

for then not only does each roll act to dry the paper and iron it, but with the rolls arranged as they are their hoods would conjom with them in such manner that the hot air escaping from their respective'chambers, as before explained, would be applied to both surfacesv Yof the web. of paper','especially those sides or portions running between the rolls B and B and B and B2.

i Referring to Fig. 1, it will be seen that for every section o f the machine the hotairin the hood conjoining with the roll B would .not only act to heat the roll, but the hot air ing said roll and from the other si e of the hood would flow upon the outer surface of that portion or side of the web of paper rulining between the rolls B and B. On the other hand, the hot air in the hood conjoining with roll B would not only effcctthe heating of the roll, but escaping on the one side would be applied to the inner surface of that ortion or side of the web passin between t e rolls B and B, and from the ot er side of the hood the air would be applied to the inner surface of that portion or side of the web of aper assing between the rolls B and B2, whi e the hot air 'in the hood in conjunction with the v roll' B2 would not onl heat .the roll, but escaping on the one si e would be applied to the outer surface of the side or portion of the web of paper passing between the rolls B and B2 and from the other side would be applied rially increased', affording a safe mode of drying the paper without injuring its fiber.

sus

to that portion or sideof the web of paper passing from said roll B2 and onward to the next section of the machine, where the same operation would be repeate It is unneccessary to refer in further detail to the utility of this mode of d IiJ'ying the paper. By the use of the hood not o y are the rolls heated by hot air and not by steam, but the paper is also dried by direct application of hot-air influence applied for the most part to both of its sidesor surfaces. This makes a practically continuous drying operation, with the rolls erforming the additional function of smoot g the paper and imparting a gloss to it. Itis also to be taken into considerationthat lthis element ofthe hood aording a means for hot-air application to Ithe drier-rolls and web of paper maybe applied to machines already in use having steamheated drier rolls without any material changes made in the structure of the machines. It affords, in other words, a means by the application of which to old machines their drying capability may be very mate- Having thus -provided for drying the web of paper, my invention further pertains, as I have already stated, to a cordination of m'eans by which -its proier tension may be effected and maintaine bly which means also any undue tension on t e web of paper occasioned by its contraction or shrinkage in drying may be niet and automatically compensated for, by which means also any tend- 4ency to undue or abnormal tension in the 65 web of paper, occasioned as aforesaid, may

' be immediately shown to the operator or recorded, whereupon, as is further provided, he may var the s eed of any one of a series of rolls, an therehy thus make compensation for a variable contraction or shrinkage of th'e paper webat different points in the machine and maintain it also at such proper variable j i tension as will eect the best results. For these purposes I have shown a series of compensating or tension rolls E, under each of which rolls by a fold the web of paper is adapted to run.v For the particular type of` machine shown I' prefer to arrange these rolls on the frame between the drier-rolls B2 and B of its adjacent sections. Each roll E has bearings to turn at each end of its shaft in pillow-.blocks e or other means, providing journals therefor. Each of the pillow-blocks eis mounted between standards e e2, disposed on the respective to bearing-plates a of adjacent sections of t e frame, to which the standards are bolted or otherwise secured by a base-plate e3. The-respective pillow-blocks are also retained to move up and down or to have vertical play between their respective standards by grooves e4 in the sides of said blocks, into which grooves fit tenons e5, extending from the standards.

With a tension-roll thus movably mounted -and with the web of paper forming a fold to pass under it the effect is for the paper by its contracts-that is, if the roll be properly graduated in weight or counterbalanced, so as not toresist too much the contractingor lifting stress or tension of the paper. In other words, the weight of the roll may be so graduated or the roll so counterbalanced that it will not be moved by any normal and propertension of the web of paper for any part of the machine, and so will act to maintain the web of paper at such normal and proper tension; but immediately upon the tension of the paper having a tendency to increase by the contraction or shrinka e of the paper then the resistance of the roll 1s immediately overcome and the undue or abnormal tension is instantly and automatically compensated for. For the purpose, therefore, of

graduating-the resistance of each roll E to the lifting stress of the paper I' have provided it with a counterbalancing means, as follows: There is arranged at one side of the roll a rock-shaft E. This shaft turns in pillowblocks or other bearin s e6, which are mounted, preferably, upon rackets, extending, respectively, from the standards e, fixed to the top plate of the frame, as before explained. Projecting from one side of the rock-shaft E at either end thereof are arms e, from which hang links e9,the .respective arms catching around pins el", -fixed in the sides of said links. These links e9 connect with the ends of the shaft of the tension-roll E outside its respective pillow-blocks or bearings and in a mantension or stress to lift the roll as it shrinks or i ner not to interfere with its rotation, on which account the respective links e are provided with boxes e, in which boxes the ends of the shaft of the tension-roll are ada ted to turn. From the other side of the roc r-shaft there extends one or more arms 612, preferably two, as shown, one vat each end of the shaft on either side of the machine. Upon each of the arms e12 there is arranged to slide or be adjusted' a counterbalancing-weight E2. This weight has depending from it a sleeve ela, arranged to slipV up the arm @12, and is provided with a binding-screw el, the engagementof `which with the side of the arm acts as a stop and holds the counterbalance at any point of adjusted position. This-means just described practically forms a lever having an adjustable counterbalance upon one side thereoffor partially overbalancin or offsetting the weight of the tension-rol and it is mechanically obvious that the counterbalance E2 may be set at such point of adjusted position that through the intervening arms of the rock-lever and connecting-links the weight of the roll E may be offset to a greater or less degree, depending upon the position of the counterbalance, with the effect that the roll will not be affected by any normal or proper tension of the web of paper, be it little or much, on .which account the' roll properly counterbalanced may act to define the normal and proper tension of the pa er in any part of the machine where it is p aced; but immediatelyuponl the tension of the paper web having a tendency to increase by the contraction or shrinkage of the paper in drying then the resistance of the roll is overcome. The roll is then lifted by the tensional stress of the web of pa er, and the abnormal tension is automatical y relieved or compensated for. This variableA compensating or graduating of the Weight of the tension-roll y the position of its counterbalance is of importance by reason of the fact that when the web of paper begins first to be acted upon by the driers it is extremely delicate and it can be maintained under very little tension, this necessitating that the weight of the tensionroll E at this point of the machine should be nearly offset by its counterbalance, whereby it will readily res ond to and be lifted by the web of paper un er the least degree of stress or abnormal tension. As the web of paper dries, however, it can stand and should be given more tension in order that it may run and dry smooth. Accordingly by properly offsetting the weight of the roll E at another point or points in the machine by the position of the counterbalance the roll or rolls may be graduated to resist an increasing tensional stress, and so the web of paper be maintained, depending upon its condition, at an increasing norma or proper tension; but, as said before, immediately upon the tension of the web of paper becoming undue or excesceases sive then the roll will be lifted and the tension immediately relieved.

Any tendency to undue or abnormal tension in the web at any point is immediately shown to the operator and recorded by means of an indicator-hand F, arranged on the end of the rock-shaft E. This indicator-hand shows on a dial F, supported'by a bracket F2, fixed to 'the side of the frame. The operation is that when a tension-roll E at any point in the machine is lifted by any undue tension of the web of paper 'at such pointl then the rock-shaft by the lifting of the tension-roll is overcome by the Weight of the counterbalance, with the eHect that the hand on the end of the rock-shaft is likewise turned and shows on the dial not only that the tension-roll is lifted and *that the web of paper at this point is undergoing 'shrinkage or contraction, and so a tendency to undue or abnormal tension, but the hand also shows by the lifted position of the roll that further means for relieving the tension on the paper should at once be resorted to before the tension-roll will have been lifted to a point Where it is no longer of avail to relieve the tension, it being at the most a temporary expedient.

For the further relief of the tension on the -web of paper I provide a means-for varying Ethe speed of each one of the rolls-B. For -this purpose each roll B is separately driven direct off as eed-changing device G. This device should) be one by which the speed of the roll may be varied With much delicacy, and for this purpose I prefer to use a speedchanging device like that described in my pending applicatiom, Serial N o. 196,804, filed March 7, 1904. Each device G, as

shown, is controlled by a hand-wheel G. By varying through the medium of the speedchanging device the speed of any one or more o f the rolls B the tension on the Web of paper may be relieved at any point in the web, so making compensation for a variable contraction or shrinkage of the paper at dierent points, as shown by the indicator, or slack may be taken up in any particular portion of the web and the web of paper maintained at such proper variable tension, dependingupon the condition of the paper, as will effect the best results.

With reference now to other improvements embodied in the machine, inasmuch as it is arranged to vary the speed of each one of the rolls B and inasmuch as a felt is preferably used with the rolls for holding the Web of paper pressed against the same each roll is accordingly provided with a separate felt H. The felt H 1s in the nature of an endless belt, and it is arranged to run upon a series of rolls h h and h2 h3, arranged on the respective sides of the machine. The rolls h h turn in pillow-blocks h4 h5, resting on bearings h k7, extending from the sides of the frame, and above the rolls h2 h3 turn in pil- IOO IIO

low-blocks hs hi-o'r other journals, said pillow-blocks resting upon brackets 72,1 h, also extending from the sides of the frame.

With respect to the tensional rolls or devices it is very evidentl that they may be adapted to any machine where the paper is dried in the continuous web. The means also for regulating the devices may also bev varied in detail without de arting from the essence of my invention, t ese changes de- `pending upon the circumstances ory conditions under which the said devices are used.

Bythe term hot air as used in this speci- A iication I Wish to be understood as meaning any air. or elastic iiuid sufficiently hot or heated to induce heat in the drier-rolls.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States.-d

1.- In a device for drying paper in the continuous'web, a drier-roll over which the web of paper passes, and combined therewith means whereby hot air may be directed and applied to the naked surface of said rollbefore being lpplied to said web of paper passing onto and oif the same.

2. In a device for drying paper in the continuous web, a drier-roll over which the web of paper passes, and combined therewith a chamber or receptacle for receiving hot air,

. whereby it may be applied to the naked surface of said roll -before being applied to the web of paper passing onto and 0H the same.

3. In a device for drying paper in the continuous web, a drier-roll over which the web of paper passes, and combined therewith means whereby hot air may be applied to the A of paper passes, and combined therewithf-all'f naked surface of said roll and maintained in immediate contact therewith before being released to be applied to -the web of paper passing onto and oflthe same.

4. In a device for Vdrying paper in the continuous web, a drier-roll ov'er which the web chamber or receptacle for receiving hot air,l whereby it may be applied .to and maintained in immediate contact with said roll. 5. In a device for drying paper in the continuous web, a drier-roll over which the web of paper passes, and a hood in conjunetionf-l with the side thereof, forming a hot-air' chamber by which the roll may be heated.

6. In a device for drying paper in the continuous web, a drier-roll over which the web of paper passes, a hood in conjunction with the naked or exposed surface or periphery thereof, forming a hot-air chamber for heating said roll, and affording means whereby the hot air from said chamber may be applied directly to the paper web as it passes onto and od said roll.

7. In a device for drying paper in the continuous web a drier-roll over which the web' of paper passes, a hood or casing in conjunction with the said roll within the fold of the.

ot-air chamber for .heating the f ing paper 'in the con- 9. In a device for drying paper in the con- I tinuous web, a series of drier-rolls overand under which, respectively, said web of paper is caused to travel,- aV hood in conjunctlon with each of said rolls within the fold of the paper ,web assing onto and off the same, each of said oods forming a hot-air chamber for heating its respective roll, and outlets inthe sides of each of said hoods whereby the hot air from the respective chambers may be ap lied to adjacent sides or portions of the we of paper.

10. In a device for drying'paper in the continuous web, rolls or devices over which the paper is caused to travel, and a series of means for maintaining a yielding stress on said webof paper varying'for different parts thereof, thel stress of said means on the web of paper remaining constant whatever the positlon of the same may be.

1 1. In a device for drying paper in the continuous web, rolls or devices over which the justable means for maintaining a yielding stress on said web of paper varying for difierent parts thereof, the stress of said means on the web of paper remaining constant whatever the position of the same may be.

12. Ina device for drying paper in the continuous web, rolls or devices over which the @web of paper is caused to travel, and means for defining the normal or roper tension of said web of paper varyin or different parts or portions thereof, whic means is adapted to give instant automatic relief to said web of paper upon tendencyvto any undue or. abnormal tension in said parts or portions.

13. In a device for drying paper in the con- IOO v paper is caused to travel, and a series of adtinuous web, rolls or devices over which the Y.

web of paper is caused to travel, and in combination therewith a tension roll or device under which by a fold said web of Apaper is adapted to pass, means for mounting said tension-roll to be lifted by said web of paper upon any undue or excessive tension thereof, and means for partially counterbalancing the weight of said roll.

14. In a device for drying paper in the continuous web, rolls or devices over which the web of paper is caused to travel, and in combination therewith a tension roll or device against which by a fold the web of paper is adapted to travel, means for mounting said tension rollor device to be lifted by said web` of paper upon 0ccas1on, and means for varying or graduating the relative resisting weight of said tension-roll to the lifting stress or tension of said web of paper.

15. In a device for drying paper in the continuous web, rolls or devices over which the web 0f paper is caused to travel, and in combination therewith a tension roll or device under which-by a fold said web of paper is ada ted to travel, bearings for the shaft of sai roll, ways in which said bearings are retainedto slide whereby said roll may be made to yield to any excessive or undue tension in said web of paper traveling under and against the same and counterbalancing means for partially overcoming the weight of said tension roll or device against-the tensional stress of the web of paper traveling under and against the same whatever the elevated condition of said tension-roll may be.

16, In a device for drying paper in the continuous web, rolls or devices over which` the web of paper is caused to travel, andin com- .bination therewith a roll or de vice unaer which by a foldsaid web of paper is adapted' to travel, means for'mounting said roll or device whereby it may yield to the tensional stress of saidweb of paper against the same, and a lever provided with an vadjustable counterbalancing-weight on one side thereof for' partially overcoming the weight of the tension roll or device against the tensional stress of the web of pa er traveling under and against the same w ate ver the elevated position of said tension-roll may be.

17, In a device for drying paper'in the conl tinuous web, rolls or devices over which said web of paper is caused to travel, means for drying said web of pa er, tensional-means for maintaining said we of pa er at a roper or normal `tension automatlca ly yiel ing to anyundue or excessive tension therein, said means comprising a series of tension rolls or devices under which by a series of folds said web of paper is adapted to travel, means for mounting said rolls whereby they may yield tov any undue or excessive tension in said web of eac of said rolls whereby they may be pro- 'vided with`a variable resistance to the tensional stress of said web of paperat different parts thereof.

18. In a device for drying paper running at a tension in the continuous web,a tension device adapted to be overcome by the tensional strain of said web', for automatically and temporarily relieving the same, and means for regulating the running speed of said web of paper for different portions thereof,where by the tension of the web may be permanently relieved and its influence upon the tension device suspended.

19. In a device for drying paper running at1 aper, and means for counterbalancing egaasa.

a tension inthe continuous web, a tension device adapted to be overcome from a normal operative osition bythe tensional strain in. said web, or automatically and temporarily relieving the same, and means for regulating 7o the running speed of said web of pa er for different portions thereof, whereby t e tension of the web may be permanently relieved and said tension device restored to its normal position. y

20. 4In a device for drying paperrunning under tension in the continuous web, a tension device adapted to exert a yielding bear ing stress upon 4said web of paper, and meanswhereby the amount of bearing stress of said 8o tension device upon said web of paper may remain constant as said tension device yields to the tensional stress of said web of paper.

21. In a device for drying paper running under tension in the continuousiweb, a series 8 54 of tension devices adapted to exert a variable yielding bearing stress upon said web of peper for different portions thereof, and meansl whereby the amount of bearing stress of each of said tension devices may remain constant 9o assaid device yields to the tensional stress of said web of paper.

22. In' a device for drying paper running under tension inthe continuous web, a series of tension devices adapted to exert a variable yielding bearing stress uponsaid web of paper for different portions thereof, means whereby the amountof bearing stress of each of said tension de vices mayremain constant as said tension device yields to thetensiona roo strain of said web ofpaper, and means whereby the amount of sald bearing stress of each f of said tension devices may be regulated.

23. In a device for drying paper running under tension in the continuousweb, a ten- 105 sion device adapted to exert a yielding bearing stress upon said web of-paper, for auto'- matically and temporarily relieving the ten sion of the same, means whereby the amount of bearing stress of said tension device may 'A1 ro remain constantl as said tension, device yields to the tensional strain of said web ofvpaper, and means for regulating the running speed of said web of paper for different portions thereof,`whereby the tension of the web may be permanently relieved and its iniiuence upon the tension de vice suspended.

24. In a device for drymgpaper running under tension in the continuous web, a tension device adapted when in normal position 12o to have bearing stress u on said web of paper, said tension device a so being made yielding, whereby it may be overcome by the tensional strain of said web, forautomatically and temporarily relieving the same, and means whereby the bearing stress of said tension device upon said web of paper' may remain constant for different positions thereof.

25. In a device for drying paper running under-tension in the continuous web, a ten- 13o sion device adapted when in normal osition to bear with stress upon said web o paper,

said tension device also being made yielding, whereby it may be overcome by the tensional strain of said web of paper, for automatically and temporarily relieving the same, means whereby the beal'in stress of said tension device upon said we -of paper mayremain constant for diHerent positions thereof, and means for regulating the running speed of said web of paper for different portions 'thereof, whereb the tension of the web may be permanent y relieved and said tension device restored to itsnormal position.

26. In a device for drying paper in the continuous web, a series of devices for maintaining said web of paper at proper variable tension for dierent portions thereof, a series of indicators for showing any undue or excess-I ive tension in said different portions ofthe web, and means operated upon by said web of paper upon any undue or excessive tension in said diiferent portions of the web for operating said indicators.

27. In a device for drying pa er in the continuous web, a tension roll or evice against which by a fold said web of paper is caused to travel, means-for mounting said` roll to yield to any undue or excessive tension in said web of paper, a rock-shaft and mounting therefor, a counterbal'ancin -wei ht, means connecting said tension ro l or evice a'nd said rockshaft whereby upon any yielding movement in said tension-roll said counterbalancingweight may act to turn said rock-shaft, and

indicating means connected with said rockshaft to be operated thereby.

28. In a devicewfor drying paper in the continuous web, a tension roll or device under which b a fold said web of paper is caused'4 .tinuous web, a series 29. In a device for d olfyi'ld s. under and over which said web of paper is caused to travel, a series of tension rolls or devices under which by a corresponding series of folds said web of paper is likewise caused to travel, means for mounting each of said rolls` whereby it may automatically'yield to any excessive or un- 'due tension in said web of paper, means o erated upon thereby for indicating the yiel in of such roll, and means for varying the Spee of any one or more of the said iirst-mentioned series of rolls. y

30. In a device for d 'ng paper in the continuous web, a series o rolls over and under which said web of pa er is caused to travel, means for dr g sai web of aper, a series of tension ro ls or devices un er which by a correspondingA seriesof folds said web of paper is likewise caused to travel, means for mounting each of said rolls to yield automatically `to any excessive or undue tension in said web of paper, means for va ing the yielding resistance of said tension-ro ls to the tensional or bearing stress of the web of paper, and means for varying the speed of any one or more of the first-mentioned series of rolls. v

31. In a device for dr paper in the continuous web, a series of ro'ils under and over which said web of pa er is caused to travel, means forA dr g sai web of paper,l a seriesof tension ro ls or devices under which by a corresponding series of folds said web of paper-is likewise caused to travel, means for mounting each of said rolls to yield automatically to any excessive or undue tension in said web of paper, means for va ng the. yielding resistance of said tension-ro ls to the tensional or bearing stress of the web of paper, indicating means connected to be ,operated upon the 'elding of any one of said tension-rolls for s owing the tensional stress of said web of'paper, and means for varying the speed of. any one or more of said first-mentioned series of rolls in consequence thereof. v

WILLIAM M. BARBER.

Witnesses:

JOHN E. R. HAYES, J. M. DOLAN.

.paperin the con- 

